/*
 * @Author: Null
 * @Date: 2022-08-01 11:41:48
 * @Description
 */
// v-dialogDrag: 弹窗拖拽属性
export default {
  bind (el, binding, vnode, oldVnode) {
    // 弹框可拉伸最小宽高
    const minWidth = 400
    const minHeight = 300
    // 初始非全屏
    let isFullScreen = false
    // 当前宽高
    let nowWidth = 0
    // let nowHight = 0
    // 当前顶部高度
    let nowMarginTop = 0
    // 获取弹框头部（这部分可双击全屏）
    const dialogHeaderEl = el.querySelector('.el-dialog__header')
    // 弹窗
    const dragDom = el.querySelector('.el-dialog')
    // 全屏按钮
    dialogHeaderEl.insertAdjacentHTML(
      'beforeEnd',
      '<div class="zoomInOutBox"><div class="zoomInOut-css changeBig"></div><div class="zoomInOut-css changeSmall"></div></div>'
    )
    const bigBtn = el.querySelector('.zoomInOutBox')
    const changeBig = el.querySelector('.changeBig')
    const changeSmall = el.querySelector('.changeSmall')
    // 给弹窗加上overflow auto；不然缩小时框内的标签可能超出dialog；
    dragDom.style.overflow = 'auto'
    // 清除选择头部文字效果
    // dialogHeaderEl.onselectstart = new Function("return false");
    // 头部加上可拖动cursor
    dialogHeaderEl.style.cursor = 'move'
    // 获取原有属性 ie dom元素.currentStyle 火狐谷歌 window.getComputedStyle(dom元素, null);
    const sty = dragDom.currentStyle || window.getComputedStyle(dragDom, null)
    const moveDown = (e) => {
      // 鼠标按下，计算当前元素距离可视区的距离
      const disX = e.clientX - dialogHeaderEl.offsetLeft
      const disY = e.clientY - dialogHeaderEl.offsetTop
      // 获取到的值带px 正则匹配替换
      let styL, styT
      // 注意在ie中 第一次获取到的值为组件自带50% 移动之后赋值为px
      if (sty.left.includes('%')) {
        styL = +document.body.clientWidth * (+sty.left.replace(/\%/g, '') / 100)
        styT = +document.body.clientHeight * (+sty.top.replace(/\%/g, '') / 100)
      } else {
        styL = +sty.left.replace(/\px/g, '')
        styT = +sty.top.replace(/\px/g, '')
      }

      document.onmousemove = function (e) {
        // 通过事件委托，计算移动的距离
        const l = e.clientX - disX
        const t = e.clientY - disY
        // 移动当前元素
        dragDom.style.left = `${l + styL}px`
        dragDom.style.top = `${t + styT}px`

        // 将此时的位置传出去

        // binding.value({x:e.pageX,y:e.pageY})
      }

      document.onmouseup = function (e) {
        document.onmousemove = null
        document.onmouseup = null
      }
    }

    dialogHeaderEl.onmousedown = moveDown

    // 双击头部全屏效果

    let isFullScreenTimes = 0

    bigBtn.onclick = (e) => {
      if (isFullScreen === false) {
        changeBig.style.display = 'none'
        changeSmall.style.display = 'block'
        nowWidth = dragDom.clientWidth
        // nowHight = dragDom.clientHeight
        nowMarginTop = dragDom.style.marginTop
        dragDom.style.left = 0
        dragDom.style.top = 0
        dragDom.style.transform = 'none'
        dragDom.style.position = 'fixed'
        dragDom.style.height = '100VH'
        dragDom.style.width = '100%'
        dragDom.style.marginTop = 0
        isFullScreen = true
        isFullScreenTimes++
        dialogHeaderEl.style.cursor = 'default'
        dragDom.style.cursor = 'default'
        dialogHeaderEl.onmousedown = null
      } else {
        changeBig.style.display = 'block'
        changeSmall.style.display = 'none'
        dragDom.style.height = 'auto'
        dragDom.style.width = nowWidth + 'px'
        dragDom.style.marginTop = nowMarginTop
        isFullScreen = false
        dialogHeaderEl.style.cursor = 'move'
        dragDom.style.cursor = 'default'
        dragDom.style.left = '50%'
        dragDom.style.transform = 'translateX(-50%)'
        dialogHeaderEl.onmousedown = moveDown
      }
    }

    dragDom.onmousemove = function (e) {
      // const moveE = e

      // 第一次
      if (!isFullScreenTimes) {
        if (
          e.clientX > dragDom.offsetLeft + dragDom.clientWidth - 10 ||
          dragDom.offsetLeft + 10 > e.clientX
        ) {
          dragDom.style.cursor = 'w-resize'
        } else if (
          el.scrollTop + e.clientY >
          dragDom.offsetTop + dragDom.clientHeight - 10
        ) {
          dragDom.style.cursor = 's-resize'
        } else {
          dragDom.style.cursor = 'default'
          dragDom.onmousedown = null
        }
      } else {
        dragDom.style.cursor = 'default'
        dialogHeaderEl.style.cursor = 'move'
        dragDom.onmousedown = null
      }

      dragDom.onmousedown = (e) => {
        const clientX = e.clientX
        const clientY = e.clientY
        const elW = dragDom.clientWidth
        const elH = dragDom.clientHeight
        const EloffsetLeft = dragDom.offsetLeft
        const EloffsetTop = dragDom.offsetTop
        dragDom.style.userSelect = 'auto'
        const ELscrollTop = el.scrollTop

        // 判断点击的位置是不是为头部

        if (
          clientX > EloffsetLeft &&
          clientX < EloffsetLeft + elW &&
          clientY > EloffsetTop &&
          clientY < EloffsetTop + 100
        ) {
          // 如果是头部在此就不做任何动作，以上有绑定dialogHeaderEl.onmousedown = moveDown;
        } else {
          document.onmousemove = function (e) {
            e.preventDefault() // 移动时禁用默认事件
            // 左侧鼠标拖拽位置

            if (clientX > EloffsetLeft && clientX < EloffsetLeft + 10) {
              // 往左拖拽
              console.log('往左拖拽')
              if (clientX > e.clientX) {
                dragDom.style.width = elW + (clientX - e.clientX) * 2 + 'px'
              }

              // 往右拖拽
              console.log('往右拖拽')

              if (clientX < e.clientX) {
                if (dragDom.clientWidth < minWidth) {
                  console.log(123132)
                } else {
                  dragDom.style.width = elW - (e.clientX - clientX) * 2 + 'px'
                }
              }
            }

            // 右侧鼠标拖拽位置
            console.log('右侧鼠标拖拽位置', EloffsetLeft + elW - 10, EloffsetLeft + elW)
            console.log('clientX', clientX)

            if (
              clientX > EloffsetLeft + elW - 10 &&
              clientX < EloffsetLeft + elW
            ) {
              // 往左拖拽
              console.log('往左拖拽')

              if (clientX > e.clientX) {
                if (dragDom.clientWidth < minWidth) {
                  console.log(123132)
                } else {
                  dragDom.style.width = elW - (clientX - e.clientX) * 2 + 'px'
                }
              }

              // 往右拖拽
              console.log('往右拖拽', clientX, e.clientX)

              if (clientX < e.clientX) {
                console.log("elW + (e.clientX - clientX) * 2 + 'px'", elW + (e.clientX - clientX) * 2 + 'px')
                dragDom.style.width = elW + (e.clientX - clientX) * 2 + 'px'
              }
            }

            // 底部鼠标拖拽位置
            console.log('底部鼠标拖拽位置')

            if (
              ELscrollTop + clientY > EloffsetTop + elH - 20 &&
              ELscrollTop + clientY < EloffsetTop + elH
            ) {
              // 往上拖拽
              console.log('往上拖拽')

              if (clientY > e.clientY) {
                if (dragDom.clientHeight < minHeight) {
                  console.log(123132)
                } else {
                  dragDom.style.height = elH - (clientY - e.clientY) * 2 + 'px'
                }
              }

              // 往下拖拽
              console.log('往下拖拽')

              if (clientY < e.clientY) {
                dragDom.style.height = elH + (e.clientY - clientY) * 2 + 'px'
              }
            }
          }

          // 拉伸结束
          document.onmouseup = function (e) {
            document.onmousemove = null
            document.onmouseup = null
          }
        }
      }
    }
  }
}
